Special monitor for detecting whether water tank of cleaning machine is in place

The utility model discloses a special monitor for detecting whether a water tank of a cleaning machine is in place or not. The device comprises a shell, an end cover, a detection rod, an elastic pieceand a sensor, the right side of the shell penetrates through the machine tool protection plate; the left side of the shell is detachably and fixedly connected with the machine tool protection plate;the end cover is detachably and fixedly connected to the shell; the detection rod sequentially penetrates through the center of the end cover and the center of the shell from left to right and extendsto the right side outside the shell; the detection rod is provided with a limiting piece, the detection rod is sleeved with an elastic piece, the elastic piece is located between the right side of the limiting piece and the interior of the right side of the shell, the limiting piece is elastically connected into the shell in a sliding mode, the left end of the detection rod detachably abuts against the water tank, and the